fix(vite): Ensure sentryVitePlugin always returns an array of plugins (#832)

Normalizes the vite plugin to always return an array of plugins.

Author: nicohrubec

packages/vite-plugin/src/index.ts

@@ -73,7 +73,11 @@ const sentryUnplugin = sentryUnpluginFactory({
   bundleSizeOptimizationsPlugin: viteBundleSizeOptimizationsPlugin,
 });
 
-export const sentryVitePlugin: (options?: Options) => VitePlugin[] = sentryUnplugin.vite;
+export const sentryVitePlugin = (options?: Options): VitePlugin[] => {
+  const result = sentryUnplugin.vite(options);
+  // unplugin returns a single plugin instead of an array when only one plugin is created, so we normalize this here.
+  return Array.isArray(result) ? result : [result];
+};
 
 export type { Options as SentryVitePluginOptions } from "@sentry/bundler-plugin-core";
 export { sentryCliBinaryExists } from "@sentry/bundler-plugin-core";

packages/vite-plugin/test/public-api.test.ts

@@ -32,4 +32,17 @@ describe("sentryVitePlugin", () => {
       ])
     );
   });
+
+  it("returns an array of Vite pluginswhen unplugin returns a single plugin", () => {
+    const plugins = sentryVitePlugin({
+      authToken: "test-token",
+      org: "test-org",
+      project: "test-project",
+      disable: true, // This causes unplugin to return only the noop plugin
+    });
+
+    expect(Array.isArray(plugins)).toBe(true);
+    expect(plugins.length).toBeGreaterThanOrEqual(1);
+    expect(plugins[0]).toHaveProperty("name");
+  });
 });